Compact linear actuators: Space-saving linear motion systems for high-precision applications
Compact linear actuators combine a ball screw drive, linear guide, and actuator profile into a highly integrated unit. This design enables precise linear motion in confined spaces – without the need for complex design and assembly of separate components.
Thanks to their compact construction, these actuators are ideal for modern CNC machines, positioning systems, automation equipment, and applications in the semiconductor and manufacturing industries, where maximum accuracy and repeatability are essential.
Technology and design
Our compact linear actuators are built using high-quality steel components from the Japanese premium manufacturer NB, globally recognized for precision linear motion technology and long-lasting high-performance systems.
The actuators integrate multiple components into a single unit:
- Ball Screw Drive – ensures backlash-free linear motion with maximum precision.
- Linear Guide – provides smooth, low-friction motion along the axis.
- Actuator Profile – serves as a rigid structural base, simplifying installation and reducing vibrations.
By integrating all three elements, the result is a compact, high-rigidity system with high power density, which can be easily integrated into machinery and automation systems.
Each compact linear actuator from PGM Motion is manufactured in accordance with ISO 230-7 and DIN 69051 standards.
Before delivery, every unit undergoes 100% testing for running accuracy, rigidity, and noise characteristics.
This ensures consistent, repeatable precision at micrometer level, fully documented in our inspection reports.
Benefits of our compact linear actuators
- Space-saving design: Integration of drive system, linear guide, and structural components into a single unit.
- High precision and repeatability: Ideal for CNC machines and metrology equipment.
- Reduced assembly effort: No complex alignment of ball screw and linear guide required.
- High rigidity and low vibration: Minimizes vibration during high-speed motion.
- Compatible with various bearing types: Can be combined with cylindrical roller bearings, barrel roller bearings, tapered roller bearings, or angular roller bearings for maximum load capacity.
- Low maintenance and long service life: Thanks to precision manufacturing and enclosed linear guide systems.
Applications of compact linear actuators
Compact linear actuators are used wherever high precision and compact design are critical:
- Semiconductor Industry: Positioning systems for chip and wafer handling.
- CNC Machinery: Feed and positioning axes with minimal installation space.
- Automation and robotics: Linear motion in compact assemblies and modules.
- Metrology and testing Equipment: High-repeatability axis systems with minimal backlash.
- Production lines: Integration into handling systems, gantry systems, and dispensing equipment.
Compact linear actuators vs. Conventional linear systems
| Feature | Compact Linear Actuator | Linear Guide + Ball Screw |
| Assembly Effort | Minimal – pre-assembled unit | High effort for alignment |
| Size | Very compact | Depends on individual components |
| Rigidity | High due to integrated profile | Depends on system connection |
| Accuracy | Factory pre-aligned | Dependent on assembly |
| Cost-Performance Ratio | Highly efficient | Higher overall effort |
By combining linear motion technology with an integrated drive system, compact linear actuators not only save space but also increase overall system precision – a key advantage in modern mechanical engineering.
Technical specifications and options
- Stroke lengths: Customizable to meet specific application requirements
- Lead options: Optimized for high speed or high force
- Drive compatibility: Suitable for servo motors, stepper motors, or pneumatic systems
- Material options: Hardened steel, stainless steel, or aluminum profiles
- Bearing Options: Available with cylindrical roller bearings, axial cylindrical roller bearings, and tapered roller bearings for different load conditions
Integration into modern drive systems
Compact linear actuators can be seamlessly integrated with motion control systems, servo drives, and Industry 4.0 control architectures. Thanks to standardized interfaces (e.g., IEC motor flanges, IO-Link), they enable fast and efficient integration into automated production lines and robotic modules.
Why choose compact linear actuators from PGM Motion?
PGM Motion stands for maximum precision, reliability, and application-focused engineering support.
Our compact linear actuators offer:
- Made in Japan (NB Technology): Precision at the micrometer level
- Long-Term Stability: Reliable performance under high loads and continuous operation
- Modular combinations: Easily configurable for custom applications
- Ideal for high-performance drives: Optimal in combination with advanced linear drive systems or ball screw assemblies
We provide both standard solutions and fully customized designs, tailored to your specific industrial application.
Our engineering team supports you with system sizing, CAD integration, and selection of the optimal drive solution.
Get in touch now or download our application examples and product catalog.
FAQ – Frequently asked questions about compact linear actuators
1. What is the difference between a compact linear actuator and a conventional linear axis?
A compact linear actuator integrates the ball screw drive, linear guide, and actuator profile into a single system. This eliminates the need to assemble and align multiple components. A conventional linear axis, by contrast, consists of separate parts that must be individually aligned.
2. When should a compact linear actuator be used?
Compact actuators are ideal for applications where space is limited, high precision is required, and assembly time must be minimized—for example, in CNC machines, assembly lines, or automated testing systems.
3. Which types of bearings are used in compact linear actuators?
Depending on the application, cylindrical roller bearings, barrel roller bearings, tapered roller bearings, or angular roller bearings can be used. These choices affect the load capacity and smoothness of motion.
4. How are compact linear actuators maintained?
Thanks to enclosed linear guide systems, maintenance is minimal. Regular lubrication and visual inspections for backlash or unusual noises are usually sufficient to ensure a long service life.
5. Are compact linear actuators compatible with different drives?
Yes. They can be combined with servo motors, stepper motors, pneumatic actuators, or electric linear drives. The choice depends on speed, force requirements, and application.
6. Can a compact linear actuator be customized?
Yes. We manufacture custom actuators on request with specific stroke lengths, lead options, and motor interfaces—including 3D CAD models for your design integration.
7. How does the actuator size affect precision and load capacity?
Larger profile cross-sections increase rigidity and load capacity, while smaller versions are ideal for lightweight applications or pick-and-place systems.
8. Are there any lubrication or maintenance recommendations?
Yes. For extended service life, we recommend lithium-based or molybdenum greases, with re-lubrication every 500 hours under continuous operation.
